This breed is maintained at the El Enc´ın Experimental
Station (Alcal´a de Henares, Spain) as part of a
genetic resources conservation program that started in
1975 (Campo and Orozco, 1982). Chicks of this breed
(mixed-sexes, all the same age) were reared in an alllitter
floor pen at a density of 10 birds/m2 until 8
weeks of age. The temperature was maintained (using
gas heaters) at 33–35oC at chick level for 1 week, followed
by a reduction of 3oC each week until 18–20oC
was reached at 6 weeks of age. Artificial light was only
provided during the first week (23L:1D). The males (n
= 60) were then housed separate from the females between
8 and 22 weeks of age in straw litter pens (4
birds/m2). All birds were fed standard rearing diets containing
19% CP, 2800 kcal ME/kg, 1% Ca, and 0.5%
available P until 8 weeks of age, and 15% CP, 2700 kcal
ME/kg, 0.9% Ca, and 0.4% available P from then on.
Feed and water were supplied ad libitum.
This breed is maintained at the El Enc´ın ExperimentalStation (Alcal´a de Henares, Spain) as part of agenetic resources conservation program that started in1975 (Campo and Orozco, 1982). Chicks of this breed(mixed-sexes, all the same age) were reared in an alllitterfloor pen at a density of 10 birds/m2 until 8weeks of age. The temperature was maintained (usinggas heaters) at 33–35oC at chick level for 1 week, followedby a reduction of 3oC each week until 18–20oCwas reached at 6 weeks of age. Artificial light was onlyprovided during the first week (23L:1D). The males (n= 60) were then housed separate from the females between8 and 22 weeks of age in straw litter pens (4birds/m2). All birds were fed standard rearing diets containing19% CP, 2800 kcal ME/kg, 1% Ca, and 0.5%available P until 8 weeks of age, and 15% CP, 2700 kcalME/kg, 0.9% Ca, and 0.4% available P from then on.Feed and water were supplied ad libitum.
การแปล กรุณารอสักครู่..